Recently Seagate unleashed a 10TB hard drive which is a helium-filled hard drive in volume and the hard drive has seven-platter. Now Seagate is shipping the 10TB helium-filled hard drive worldwide and its hit the goal without using performance-penalizing technologies similar to SMR (Shingled Magnetic Recording). When high capacity drives uses the SMR earlier, it penalizes drive writes compared with non-shingled perpendicular recording. Densities of hard drive are being boosted by the SMR, but unfortunately it affects the read performance of the drive and more recent drives from all vendors have shifted back towards typical perpendicular recording.
Nowadays Helium-filled hard drives are slowly making their path into data centers and enterprise drives. With the 10TB hard drive Seagate is pushing the envelope on absolute drive capacity as well. The 10TB hard drive has got seven drive platters and fourteen heads in total to make the drive more efficient.
The given image is from HGST presentation, not Seagate, but it describes why drive Manufacturer Company has moved to helium from typical convention. Moving towards helium is a method of improving enterprise HDDs. Manufacturer can include more platters in a given space by cutting the resistance. This will also increase the density of the drive. Power consumption of the drive can be reduced by decreasing the resistance. According to Seagate helium-filled hard drives will use 2W less power than the typical HDDs. 2W might not sound like too much but it is a matter of fact while you are using an array of thousand hard drives. Power consumption of 2W of thousand drives can save lot of power so 2W is not so less.
SSDs also fairly common around the industry for a number of years, concerns about the reliability and price ensured that typical hard drives continued to power the overall market. Because of decreasing costs the advance technology like 3D NAND have allowed companies like Samsung to go back to older 40 nm process technology with superb reliability and overall performance.